EP3857314A1 - Verfahren zur regelung eines chemischen prozesses in einer grosstechnischen chemischen anlage - Google Patents
Verfahren zur regelung eines chemischen prozesses in einer grosstechnischen chemischen anlageInfo
- Publication number
- EP3857314A1 EP3857314A1 EP19778446.5A EP19778446A EP3857314A1 EP 3857314 A1 EP3857314 A1 EP 3857314A1 EP 19778446 A EP19778446 A EP 19778446A EP 3857314 A1 EP3857314 A1 EP 3857314A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chemical
- manipulated variable
- state variables
- machine learning
- program
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
- G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
- G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B17/00—Systems involving the use of models or simulators of said systems
- G05B17/02—Systems involving the use of models or simulators of said systems electric
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Program-control systems
- G05B19/02—Program-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41865—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by job scheduling, process planning, material flow
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F18/00—Pattern recognition
- G06F18/20—Analysing
- G06F18/21—Design or setup of recognition systems or techniques; Extraction of features in feature space; Blind source separation
- G06F18/214—Generating training patterns; Bootstrap methods, e.g. bagging or boosting
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06N—COMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
- G06N20/00—Machine learning
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
Definitions
- the present invention relates to a method for controlling a chemical process in an industrial chemical plant. Furthermore, the present invention relates to a system for regulating a chemical process carried out in a large-scale chemical plant and to a chemical plant with such a system.
- a constant concern in the state of the art is to equip large-scale chemical plants with an advanced process control system or to retrofit existing plants in order to optimize plant operation taking into account all safety rules.
- the aim is to improve control, transparency, maintenance and performance so that production is achieved in accordance with predetermined target values and at the same time a failure of the chemical Production plant, which is usually associated with considerable costs, can be avoided.
- the object of the present invention is to provide an improved industrial, chemical plant operation.
- the large-scale chemical plant to be controlled can is a production plant, in particular a chemical production plant.
- the system can be made up of a large number of subsystems (for example 5-10 or more).
- a subsystem is characterized in particular by the fact that it can be an independently functioning assembly, the function of which preferably has a direct influence on the production or the production flow.
- the plant to be controlled can be a plant for the production of sulfuric acid, coke, polymers, fertilizers, synthesis gas, cement, urea, ammonium nitrate or a plant for water desalination.
- the process includes the steps:
- Control system to a computer system, wherein the computer system
- Control program by processing the simulated state variables and read from the memory
- simulated state variable here is a state variable of the chemical plant that actually exists at the time of the simulation, such as a
- the determined state variables for controlling the plant operation can be used in real time.
- Real process data of the chemical plant is recorded by sensors that are set up to at least one parameter value or
- the control system serves to clearly represent a complex temporal and material-content planning and actual process and to support or enable the controlling human intervention.
- Using a fieldbus to transmit the process data recorded by the sensors is advantageous since the fieldbus replaces the parallel line bundles of the individual sensors to the control system with a single bus cable.
- Ethernet Powerlink especially selected from the group consisting of Ethernet Powerlink, EtherNet / IP, CANopen, ARCNET, AS-Interface, EtherCAT and PROFIBUS.
- At least a subset of the process data recorded by the sensors is transmitted from the control system to a computer system, the computer system being a simulation program for a stationary and / or dynamic one
- a control program for implementing a controller for the chemical process and a memory for storing simulated state variables.
- the controller which by the Control program is implemented, for example, a standard controller with P, PI, PD and PID behavior.
- a discontinuous controller such as a
- Two-point controller, multi-point controller and fuzzy controller can be implemented. Since the chemical plant can be a more complex control system with non-linear controlled systems or several linked control variables and manipulated variables, it is also conceivable that an adapted controller is implemented by the control program, such as a digital controller for meshed controls, multi-variable controls, controls in the state space or model-based regulations.
- Simulation program from the subset of the process data and storage of the simulated state variables in the memory, e.g. RAM instead.
- At least one target value of a control variable of the chemical process is also transmitted to the control program, the at least one target value, whereby of course several target values can be specified for a chemical system, manually by a user, by the control system or by calling up stored tables or values from databases are entered.
- at least a subset of the simulated state variables stored in the computer system is read into the control program for input into the control program, after which at least one manipulated variable for reaching the target value is determined by the control program by processing the simulated state variables read from the memory.
- the calculated manipulated variable is transferred to the control system.
- the determined manipulated variable can be transmitted from the control system to an actuator in the chemical system via a fieldbus, the fieldbus being the same fieldbus as described above.
- control system can include a server and the computer system can include a client include, where the server and the client are configured so that the client can read the server, so that the subset of the
- Process data is transmitted from the server to the client and that the client can carry out a write access to the calculated data
- the client-server solution advantageously achieves a higher level of access security since the client has to authenticate with the server before accessing special data.
- clients can be added and disconnected without affecting the operation of the chemical plant.
- the server of the control system is an OPC server and the client of the computer system is an OPC client.
- OPC can be used advantageously for real-time data (monitoring), data archiving, alarm messages and also directly for control (command transmission).
- OPC client and OPC server preferably with the OPC Unified Architecture (OPC UA) specification, is of particular interest, since this is not a COM interface, but a WSDL (Web Services Description Language) that is described according to COM and in Different web service protocols can be implemented, which ensures portability.
- OPC Unified Architecture (OPC UA) specification is that both scalability and security have been increased overall.
- the client is designed as a master and the server as a slave.
- control system includes a server and that
- Computer system includes a client, wherein the client can be designed as a master and the server as a slave, it can further be provided that the
- Control system has a computer interface for connecting the computer system, via which a direct communication connection is established between the control system and the computer system and at least the subset of the process data and the control variable are transmitted via the direct communication connection.
- the computer interface for connecting the computer system, via which a direct communication link between the control system and the
- Computer system can be set up, for example, by a standard computer interface, such as USB, Ethernet, WLAN, LAN, Bluetooth or other known interfaces can be realized.
- a standard computer interface such as USB, Ethernet, WLAN, LAN, Bluetooth or other known interfaces can be realized.
- the computer interface comprises a cable or is a cable connection (point-to-point) or is a wireless interface, the latter being a
- NFC Near Field Communication
- An embodiment of the method according to the invention further provides that the manipulated variable is transmitted from the control system to an actuator via the fieldbus.
- the actuator can be targeted in the control or
- Computer system includes a machine learning module, whereby to train the Machine learning module training data records are used, which are at least the subset of the simulated state variables and the result of that
- Control program contain calculated manipulated variables.
- Machine learning is known from the prior art, compare e.g.
- the training data records for training the machine learning module can include the response of the chemical system to the manipulated variable contained in the process data.
- One embodiment of the method provides that after training the machine learning module, the control program switches to the machine learning module so that it is replaced by the machine learning module, and so that the manipulated variable from the read state variables is determined by the machine learning module.
- control program and / or the control center can be dispensed with for a short or long term. This configuration is particularly interesting for the
- the machine learning module can be trained in an existing system. As soon as the machine learning module has completed all of the required training runs, since it is installed on a portable computer system, for example, it can simply be connected to the control system of the chemical system to be put into operation and control it.
- the decision when the machine learning module has completed all the required training runs can be determined, for example, by means of a confidence value of the machine learning module, this confidence value being greater than a previously assigned threshold value. In other words, if the machine learning module uses a forecast
- State variables are also entered in the machine learning module in order to determine a machine learning manipulated variable and with the further step that the machine learning manipulated variable and the manipulated variable determined by the control program are combined with one another, e.g. the average or a weighted average is formed in order to determine a resulting manipulated variable, the resulting manipulated variable being transmitted to the control system.
- This alternative embodiment of the method according to the invention can advantageously, by combining the machine-learning manipulated variable (S M L) and the manipulated variable (S R ) determined by the control program, achieve inaccuracies in the determination of the manipulated variable (S) on the part of the
- the machine learning module calculates a confidence (K; where 0 ⁇ K ⁇ 1) for the determination of the manipulated variable and the combined manipulated variable is determined weighted taking into account the respective confidence.
- the weighting of the result for the manipulated variable from the machine learning module can be proportional or identical to the confidence value with which the machine learning module has determined the result.
- the manipulated variable (S) can thus be a combination of the manipulated variable (S R ) determined by the control program and the machine-learning manipulated variable (S M L).
- the manipulated variable (S) can be linear
- the machine learning module is trained with further training data records which are generated from the further operation of the chemical plant by the regulation by means of the machine learning module.
- a system for regulating a chemical process carried out in an industrial chemical plant is proposed.
- the system is designed to carry out the method described above.
- a chemical plant with a system for regulating a chemical process carried out in a large-scale chemical plant is proposed.
- the system for controlling a chemical process carried out in an industrial chemical plant is the system described above, which is designed to carry out the method described above.
- the chemical plant is a plant for the production of sulfuric acid, coke, polymers, fertilizers, synthesis gas, cement, urea, ammonium nitrate or for water desalination.
- FIG. 1 shows a schematic illustration of a chemical plant with a system for regulating a chemical process carried out in a large-scale chemical plant, the system being designed to carry out the method according to the invention
- Fig. 2 shows an embodiment of a method according to the
- the present invention wherein the acquisition of process data, its transmission to a computer, the determination of state variables and manipulated variables, the transmission of the manipulated variables to the control system and the determination of the manipulated variables from the state variables for machine learning training are shown schematically.
- the system comprises a chemical plant 140, in particular a large-scale chemical plant, and is designed to carry out a method for regulating a chemical process.
- the system can have a fieldbus 100, a control system 110 and a computer 120 or
- Computer system include.
- the industrial chemical plant can be any suitable industrial chemical plant.
- the chemical system 140 comprises a large number of subsystems 141, 142, 143, such as burners, dryers, converters or functional lines or connections.
- the functional lines or connections can themselves be subsystems 141, 142, 143 or connect subsystems 141, 142, 143 to one another.
- the subsystems 141, 142, 143 can be installed several times in the chemical system.
- Each of these subsystems can have at least one actuator 144 and none, one or more sensors 145.
- a sensor 145 is set up to measure at least one parameter value or process data relating to the system 140.
- one or more sensors 145 may be configured to monitor a subsystem 141, 142, 143.
- a temperature of the subsystem 141, 142, 143 and / or the substance to be processed can be detected by a sensor 145.
- a sensor can be set up to record further process data, such as position data, flow rates and / or status data of the subsystem 141, 142, 143. The detected by the sensor
- Process data can be transmitted or exchanged with a control system 110 via a fieldbus 100.
- At least one setpoint 113 is transmitted to the control system 110 via an optional control center 112.
- the at least one setpoint can be transmitted to the control system 110 by user input, by the control system or by calling up stored tables or values from databases.
- At least a subset of the process data 123 is transmitted from the control system 110 to a computer system 120 (see arrow from 111 to 121).
- control system 110 includes a server 111 and the computer system 120 includes a client 121, the server 111 and the client 121 being configured such that the client 121 has a read access to the server 111, for example by means of a request-response protocol, so that the subset of the process data is transmitted from the server 111 to the client 121.
- client 121 is designed as a master and the server 111 is designed as a slave.
- the control system 110 can have a computer interface, for example a hardware interface such as PCI bus, AGP, SCSI, USB, FireWire and EIA-232 or Bluetooth, IrDA, WLAN, for connecting the computer system 120, via which a direct Communication connection between the control system 1 10 and the computer system 120 is established and at least the transmission of the subset of the process data 123 and the transmission of the manipulated variable via the direct
- a computer interface for example a hardware interface such as PCI bus, AGP, SCSI, USB, FireWire and EIA-232 or Bluetooth, IrDA, WLAN
- computer system 120 includes at least one
- a control program 129 for implementing a controller for the chemical process and a memory 122, e.g. a working memory, for storing simulated state variables 124.
- the computer system 120 finds the cyclically repeated calculation of the simulated state variables of the chemical process by the
- Simulation program 128 from the subset of process data 123 and the storage of simulated state variables 124 in memory 122 instead.
- the simulation program 128 can have a plurality of subsystem program modules (TS 1, TS2,..., TS N) 141A, 142A, 143A, each for simulating a subsystem (subsystem 1, subsystem 2, subsystem N) 141; 142; 143 of the chemical plant 140 are configured.
- the subsystem program module (TS 1) 141 A is configured such that it simulates the subsystem 1 (141).
- the subsystem program module (TS 2) 142A is configured in this exemplary embodiment in such a way that it simulates the subsystem 2 (142) and the subsystem program module (TS N) 143A is configured in this exemplary embodiment in such a way that it subsystem N (143) simulated.
- the further subsystem program module (TS N + 1) 144A is configured such that it switches or controls the individual subsystem program modules (here 141A to 143A). It can be provided here that the update frequency of the program modules 141A, 142 A, 143A is dependent on the dynamics of the respectively assigned subsystem 141; 142; 143 is configured, and the individual
- Program modules 141A, 142 A, 143A each have one or more of the simulated ones Calculate state variables and save them in the memory 122 with the respective update frequency.
- At least one target value of one is simultaneously and / or offset in time
- Control variable of the chemical process whereby a large number of target values are often specified for a chemical plant
- Control program 129 transmitted. At least a subset of the simulated state variables 124 can be read from the memory 122 for input into the control program 129. By processing the simulated state variables 124 read from the memory 122, a manipulated variable to achieve the target value 113 is then determined by the control program 129. It is pointed out that, of course, a plurality of manipulated variables can also be determined by the control program 129 in order to achieve a plurality of desired values 113, but only one manipulated variable is shown here for reasons of representability.
- the calculated manipulated variable is then transmitted to the control system 110.
- the control system 110 includes a server 111 and the computer system 120 includes a client 121.
- the server 111 and the client 121 can be configured such that the client 121 has write access to the server 111 of the control system 110
- the client 121 can be designed as a master and the server 111 as a slave.
- control system 110 can send the calculated manipulated variable via the fieldbus 100 to an actuator 144 of a subsystem (shown here for example for
- Subsystem 142 where each subsystem can have one or more actuators), wherein the actuator 144 can set the subsystem according to the calculated manipulated variable.
- the computer system 120 can include a machine learning module 130.
- the machine learning module 130 may be a supervised machine learning module.
- training data sets 125 can be used, which contain at least the subset of the simulated state variables 124 and the result thereof
- Control program 129 include calculated manipulated variables.
- the training data records 125 can include the response of the chemical system 140 contained in the process data 123 to the manipulated variable.
- a first step 200 the process data are recorded in the upper process block (dashed block). This can be done by means of sensors installed in the chemical plant.
- the process data are transmitted to the control system in a next step 201, wherein the control system can have a server, and in a further step the data is transferred to the computer 202, where the computer can have a client.
- the arrow from step 202 to step 200 is intended to reflect that data can also be transferred back from the computer to the subsystems of the chemical plant (where the process data are generated) and steps 200, 201, 202 form a process that can be carried out repeatedly.
- the lower process block dotted block
- step 204 State variables determined by the simulation program.
- the control variable is then determined in step 204 from the state variables, which is transmitted to the control system (see step 205).
- the control system then transmits the manipulated variable - if necessary after confirmation by the user - to the actuator via the control station and the fieldbus.
- the arrow from step 205 to step 203 shows that steps 203, 204, 205 form a process that can be carried out repeatedly.
- the determined state variables step 204 are also transferred to the training data records (see arrow from step 204 to step 207) and are then used to train the machine learning module (step 208).
- step 209 it is determined whether the training of the machine learning module is sufficient for determining the manipulated variable. If the machine learning module is adequately trained, the manipulated variable is determined by the machine learning module (see step 211), otherwise by the control program (see step 210).
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- Theoretical Computer Science (AREA)
- Software Systems (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Evolutionary Computation (AREA)
- Automation & Control Theory (AREA)
- General Engineering & Computer Science (AREA)
- Data Mining & Analysis (AREA)
- Medical Informatics (AREA)
- Health & Medical Sciences (AREA)
- Quality & Reliability (AREA)
- Manufacturing & Machinery (AREA)
- Computing Systems (AREA)
- Mathematical Physics (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Bioinformatics & Computational Biology (AREA)
- Evolutionary Biology (AREA)
- Testing And Monitoring For Control Systems (AREA)
- Feedback Control In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018123792.8A DE102018123792A1 (de) | 2018-09-26 | 2018-09-26 | Verfahren zur Regelung eines chemischen Prozesses in einer großtechnischen chemischen Anlage |
| PCT/EP2019/075193 WO2020064506A1 (de) | 2018-09-26 | 2019-09-19 | Verfahren zur regelung eines chemischen prozesses in einer grosstechnischen chemischen anlage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3857314A1 true EP3857314A1 (de) | 2021-08-04 |
| EP3857314B1 EP3857314B1 (de) | 2024-04-10 |
Family
ID=68069736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19778446.5A Active EP3857314B1 (de) | 2018-09-26 | 2019-09-19 | Verfahren und system zur regelung eines chemischen prozesses in einer grosstechnischen chemischen anlage |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12140914B2 (de) |
| EP (1) | EP3857314B1 (de) |
| DE (1) | DE102018123792A1 (de) |
| PL (1) | PL3857314T3 (de) |
| WO (1) | WO2020064506A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4057087B1 (de) * | 2021-03-08 | 2024-03-06 | Siemens Aktiengesellschaft | Verfahren zum bereitstellen eines prognostizierten binären prozess-signals |
| KR102888496B1 (ko) * | 2021-04-28 | 2025-11-19 | 에스케이가스 주식회사 | 상업 화학 공정에서의 공정 핵심 인자 선별을 위한 시스템 및 방법 |
| WO2022264065A2 (en) | 2021-06-16 | 2022-12-22 | 3M Innovative Properties Company | Adhesive dispensing systems and methods |
| EP4254420A1 (de) * | 2022-03-31 | 2023-10-04 | Siemens Aktiengesellschaft | Verfahrenstechnisches anlagenmodul und verfahren zum steuern eines verfahrenstechnischen anlagenmoduls |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5212765A (en) | 1990-08-03 | 1993-05-18 | E. I. Du Pont De Nemours & Co., Inc. | On-line training neural network system for process control |
| US6745169B1 (en) | 1995-07-27 | 2004-06-01 | Siemens Aktiengesellschaft | Learning process for a neural network |
| US9983559B2 (en) * | 2002-10-22 | 2018-05-29 | Fisher-Rosemount Systems, Inc. | Updating and utilizing dynamic process simulation in an operating process environment |
| DE102005025282A1 (de) * | 2005-06-02 | 2006-12-07 | Bayer Materialscience Ag | Datenverarbeitungssystem und Verfahren zur Regelung einer Anlage |
| US9529348B2 (en) * | 2012-01-24 | 2016-12-27 | Emerson Process Management Power & Water Solutions, Inc. | Method and apparatus for deploying industrial plant simulators using cloud computing technologies |
| US20170129916A1 (en) | 2014-06-26 | 2017-05-11 | Hetero Research Foundation | Novel betulinic proline imidazole derivatives as hiv inhibitors |
| EP3147729B1 (de) | 2015-09-25 | 2019-06-12 | Göcke, Tobias | Verfahren und vorrichtung zur adaptiven und optimierenden prozesssteuerung, verwendung des verfahrens |
| WO2018035718A1 (en) | 2016-08-23 | 2018-03-01 | Accenture Global Solutions Limited | Real-time industrial plant production prediction and operation optimization |
| EP3293683A1 (de) | 2016-09-09 | 2018-03-14 | Yandex Europe AG | Verfahren und system zum trainieren eines maschinenlernalgorithmus zur auswahl von prozessparametern für ein industrielles verfahren |
| EP3376373A1 (de) | 2017-03-15 | 2018-09-19 | Siemens Aktiengesellschaft | Verfahren zum einsetzen und ausführen eines maschinenlernmodells auf einer feldvorrichtung |
-
2018
- 2018-09-26 DE DE102018123792.8A patent/DE102018123792A1/de active Pending
-
2019
- 2019-09-19 WO PCT/EP2019/075193 patent/WO2020064506A1/de not_active Ceased
- 2019-09-19 EP EP19778446.5A patent/EP3857314B1/de active Active
- 2019-09-19 PL PL19778446.5T patent/PL3857314T3/pl unknown
- 2019-09-19 US US17/272,017 patent/US12140914B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018123792A1 (de) | 2020-03-26 |
| PL3857314T3 (pl) | 2024-08-05 |
| US20210286347A1 (en) | 2021-09-16 |
| WO2020064506A1 (de) | 2020-04-02 |
| BR112021003732A2 (pt) | 2021-05-25 |
| EP3857314B1 (de) | 2024-04-10 |
| US12140914B2 (en) | 2024-11-12 |
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